In the current sweeping plot that started with Inhumanity #1 this week, it is only Inhuman Blood lines that are being effected, even if it's been 15 thousand years since a full blooded Inhuman coupled with their family tree.

Considering that the Kree Scientists must have been aware of the mutant time bomb priming for the 20th century... What an Inhuman is could have been designed to weed out and cancel mutation from/by the mutant gene since it was it's natural competition to the complete domination of the genepool.

Mutants are defined by a single gene which they have and humans do not.

Luna was (in)human.

She did not have the gene.

What I am proposing is that there can (biologically) be no such thing as a mutant Inhuman hybrid because Inhuman genes dominate Mutant genes to the point of dissolution, just like there can be no such thing as an Inhuman/Human hybrid either.

Graydon Creed.

Sabertooth's completely Human son.

Was Sabertooth shooting blanks, or did he unwittingly breed with an Inhuman who did not know that she was an inhuman? Thus stripping the mutant gene from bis child.

I had an Uncle in the 70s who used to be realllly into Rod Stewart, so maybe Beast was into edgy music for his era... But it's hard to remember a time when it was ever not only old fats who listened to Rod.

That would require the x-gene not to be wanky enough to where it doesn't always show up even if you're parents are mutants and that any shown mutant/human war doesn't end with mutants in concentration camps and/or hunted down by sentinels.

It's not uncommon for a writer to start a book and make it a thing and then hand it over to someone else once it's established. Hell, Jeph Loeb only lasted a few issues on the book whose entire purpose is to make Jeph Loeb's dead son a superhero.